lucius, Ptychocheilus Girard [C. F.] 1856:209 [45] [Proceedings of the Academy of Natural Sciences of Philadelphia v. 8; ref. 1810] Colorado River, California, U.S.A. Holotype (unique): USNM 203 (lost) (1 pharyngeal arch as #2757). Type catalog: Gilbert 1998:106 [ref. 23395]. On p. 45 of separate. •Valid as Ptychocheilus lucius Girard 1856 -- (Lee et al. 1980:348 [ref. 22416], Mayden et al. 1991:820, 833 [ref. 19123], Page & Burr 1991:68 [ref. 18983], Espinosa Pérez et al. 1993:20 [ref. 22290], Swift et al. 1993:117 [ref. 22379], La Rivers 1994:381 [ref. 23389], Baxter & Stone 1995:114 [ref. 23374], Sigler & Sigler 1996:109 [ref. 25943], Gilbert 1998:106 [ref. 23395], Scott & Crossman 1998:488 [ref. 24570], Moyle 2002:158 [ref. 26449], Nelson et al. 2004:77 [ref. 27807], Scharpf 2005:37 [ref. 28940], Miller 2006:138 [ref. 28615], Minckley & Marsh 2009:161 [ref. 31114], Page & Burr 2011:160 [ref. 31215], Page et al. 2013:77 [ref. 32708], Page et al. 2023:75 [ref. 40505]). Current status: Valid as Ptychocheilus lucius Girard 1856. Leuciscidae: Laviniinae. Distribution: Western North America: U.S.A. and northern Mexico. Habitat: freshwater.